Studies for the reaction rates of radicals in interstellar space and planetary atmosphere

星际空间和行星大气中自由基反应速率的研究

• 批准号: 15550008
• 负责人: SEKI Kanekazu
• 金额: $ 2.11万
• 依托单位: Yokohama National University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15550008/
• 关键词: radical reaction; photochemistry; C2H radical; interstellar space; planetary atmosphere; LIF; acetylene; solid state reaction; 反応速度; 光反応; C_2Hラジカル

The reaction rates of C_2H radicals have been measured using the LIF method. The C_2H plays an important role for the photochemical process in interstellar space or planetary atmosphere. The measured LIF signal is based on B state of C_2H, and four spectra series was observed. These spectra can be assigned toΣ-Σ,Π-Π,Δ-Δ,Ф-Ф transition, respectively. The detailed analysis of a spectrum shows that the properties of the electronic state of C_2H and reaction rate with acetylene have be determined. On the other hand, photochemical process of C_2H radical in solid phase at low temperature has been investigated using the argon matrix method at 10K. Diacetylene formation was observed in the reaction C_2H with acetylene. The quantum yield is over one. This means that there are nano explosion occurs in the low temperature solid phase. It has a big meaning in the reaction mechanism of the unsaturated hydrocarbon expected to be radical in interstellar space or the planetary atmosphere.

用激光诱导荧光方法测定了C_2H自由基的反应速率。C2H在星际空间或行星大气的光化学过程中起着重要的作用。测量的激光诱导荧光信号是基于C_2H的B态，观察到四个光谱序列。这些光谱可分别归属于Σ-Σ，Π-Π，Δ-Δ，Ф-Ф跃迁。通过对光谱的详细分析，确定了C_2H的电子态和与乙炔的反应速率。另一方面，用Ar矩阵方法研究了10K下C_2H自由基在固相中的光化学过程。在C2H与乙炔的反应中观察到二乙炔的生成。量子产额超过1。这意味着在低温固相中发生了纳米爆炸。这对星际空间或行星大气中可能是自由基团的不饱和碳氢化合物的反应机理具有重要意义。

项目成果

M.Yagi, I.Yamamoto, R.Sasase, K.Seki: "Optical and Time-Resolved Electron Paramagnetic Resonance Studies of the Excited States of para-Methylcinnamic Acid and para-Methylcinnamate Anion"Appl.Magn.Reson.. 23. 3-4 (2003)

M.Yagi、I.Yamamoto、R.Sasase、K.Seki：“对甲基肉桂酸和对甲基肉桂酸阴离子激发态的光学和时间分辨电子顺磁共振研究”Appl.Magn.Reson.. 23。

Optical and Time-Resolved Electron Paramagnetic Resonance Studies of the Excited States of para-Methylcinnamic Acid and para-Methylcinnamate Anion

对甲基肉桂酸和对甲基肉桂酸阴离子激发态的光学和时间分辨电子顺磁共振研究

• 发表时间: 2003
• 期刊: Appl.Magn.Reson. 23
• 作者: M.Yagi;I.Yamamoto;R.Sasase;K.Seki
• 通讯作者: K.Seki

Optical and Time-Resolved Electron Paramagnetic Resonance Studies of the Excited States of para-Methylcinnamic Acid and para-Methyleinnamate Anion

对甲基肉桂酸和对甲基肉桂酸阴离子激发态的光学和时间分辨电子顺磁共振研究

• 发表时间: 2003
• 期刊: Appl.Magn.Reson. 23
• 作者: M.Yagi;I.Yamamoto;R.Sasase;K.Seki.
• 通讯作者: K.Seki.